According to MotorTrend
, General Motors is considering fitting its 4.5-liter Duramax V8 Turbodiesel inside the Cadillac CTS sedan as a stepping-stone between the standard V6-equipped CTS and the barn-burning CTS-V.

The report contends that the Duramax V8 would be an easy fit inside the confines of the CTS' engine bay with the addition of the CTS-V's bulging hood. The dual-overhead cam, four-valve diesel V8 puts out 310 hp and a tire decimating 520 lb.-ft. of torque and GM already has a transmission that can handle the grunt. The oilburner currently meets the tougher 2010 emissions standards which would allow it to be sold in all 50 states, and with a reported 20-25% increased fuel economy over the V8 model, the diesel CTS could provide some competition to similar offerings from Audi, BMW and Mercedes-Benz. According to MT
, the amount of modifications would be minimal and the addition of the CTS diesel would help to boost GM's CAFE certification to meet the stricter 35 mpg requirements in 2020.